We'll have more on the royal wedding. The choir of St. George's chapel up early rehearsing this morning. There you see them. ?????? sounds beautiful. Back to Michael at Windsor and, Michael, now getting word a big superstar may be performing. Yeah, but before we get to that I want to tell you about the carriage rehearsal. It is under way and just went right past me here. Really exciting to see and that's definitely something we know is going to happen tomorrow and everybody is excited about watching that happen right now and their rehearsal phase but the speculation you're talking about -- there's the carriage rehearsal right there. The speculation that you are talking about is the speculation of Elton John, will he be at the wedding? Will he perform? Prince Harry and -- at prince Harry and Meghan Markle's wedding. TMZ is reporting the Royals' longtime friend could take the stage at either the church or reception later that night. A close friend of princess Diana. He even sang at her funeral. He was right there at the marriage of William and Kate. There is a rumor he may attend. His website said he canceled his performances in Las Vegas because of a scheduling conflict. So we will see if Elton John will be at the wedding and if he will perform and, you know what, we got a lot more coming up for you guys a little later. So I'll throw it back. Good reporting there. Looking and finding that sir Elton John canceled. Scheduling conflict. Reading the tea leaves there. All right, good job. Oh, yeah. Full coverage by the way of the royal wedding and, robin, you'll join Michael live from Windsor tomorrow and then you and David Muir are anchoring live coverage of the royal wedding on Saturday, you're getting up early again on Saturday, robin starting at 5 owe cook A.M. Eastern. It will be totally worth it.

This transcript has been automatically generated and may not be 100% accurate.

{"id":55229119,"title":"Will a music legend perform at the royal wedding? ","duration":"1:53","description":"Some reports have claimed Elton John, who sang at Princess Diana's funeral, could sing at the ceremony or evening reception.","url":"/GMA/Culture/video/music-legend-perform-royal-wedding-55229119","section":"GMA","mediaType":"default"}